Fuel cell hybrid power tramcar united braking system and method

Abstract

The invention discloses a fuel cell hybrid power tramcar united braking system and method. The system comprises a fuel cell power supply circuit, a lithium ion battery power supply circuit, a super-capacitor power supply circuit, a traction inverter, a traction motor, a mechanical braking device, a control system, a direct current bus and a braking resistor. Optimal braking and braking energy recycling maximization are achieved when it is guaranteed that fuel cell hybrid power reliably supplies power to a tramcar load; and on the premise that the braking performance of the system is guaranteed, optimal braking uniting regenerative braking, energy consumption braking and mechanical braking is achieved, braking energy is recycled as much as possible, the fuel use rate is increased, the purpose of fuel economical efficiency is achieved, the service life of an energy storage device is prolonged, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of fuel cell hybrid power, and in particular relates to a fuel cell hybrid power tram combined braking system and method. Background technique [0002] With the rapid development of social economy, urban population density and floating population are increasing day by day, the existing urban traffic has been overwhelmed, traffic inconvenience has become a major factor restricting social and economic development, and at the same time, it has made it difficult for residents in large and medium cities to drive and ride. The phenomenon. The growth of private vehicles makes the traffic more congested, and at the same time causes air pollution and noise pollution. Urban rail transit vehicles have the advantages of large transportation volume, fast driving speed, good comfort, and low construction cost. In addition, hybrid electric trams are driven by fuel cells / batteries / supercapacitors, which are clean and pollu...

AI Technical Summary

Problems solved by technology

The energy generated during the braking process will increase the voltage of the traction network. If no absorption or consumption measures are taken, the voltage of the traction network will exceed the specified value, causing damage to other power supply equipment

At present, the regenerative braking of urban rail transit in my country mostly adopts resistance braking. The resistance braking equipment is simple and the control method is simple and reliable. Increased energy consumption

If the vehicle-mounted resistance brake is used, a series of adverse effects such as increased locomotive weight will be caused

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